Grease a 9x13 inch baking dish with cooking spray.

In a large bowl, stir together the rice cereal, oats, granola, and raisins. Set aside.

Combine the brown sugar and honey in a small saucepan over medium heat. Heat just until boiling, then remove from heat and stir in peanut butter and vanilla until smooth.

Pour peanut butter mixture over the cereal and oat mixture, and mix well.

Press into the prepared pan and allow to cool completely. Cut into bars and enjoy!